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zachary62
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layout: default
title: "Nodes (PregelNode)"
parent: "LangGraph"
nav_order: 2
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# Chapter 2: Nodes (`PregelNode`) - The Workers of Your Graph
In [Chapter 1: Graph / StateGraph](01_graph___stategraph.md), we learned how `StateGraph` acts as a blueprint or a flowchart for our application. It defines the overall structure and the shared "whiteboard" (the State) that holds information.